Rui Teixeira contributed to the NIAEFEUP/uni repository by delivering targeted improvements in both user interface and session management over a two-month period. He enhanced the restaurant slider feature using Flutter and Dart, implementing conditional rendering to display the page indicator only when multiple daily restaurants are available, which reduced UI clutter and improved user flow. Additionally, Rui addressed a critical bug in secure session storage by introducing robust error handling with a try-catch mechanism and automatic data purge on failure, thereby increasing session reliability and aligning with security best practices. His work demonstrated focused problem-solving in mobile app development.